Test for CPU_SET
[urcu.git] / tests / test_rwlock.c
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1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6982d6d7 6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 */
22
9e97e478 23#define _GNU_SOURCE
d8540fc5 24#include "../config.h"
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25#include <stdio.h>
26#include <pthread.h>
27#include <stdlib.h>
28#include <string.h>
29#include <sys/types.h>
30#include <sys/wait.h>
31#include <unistd.h>
32#include <stdio.h>
33#include <assert.h>
9e97e478 34#include <sched.h>
94b343fd 35#include <errno.h>
10c48e14 36
ec4e58a3 37#include <urcu/arch.h>
bd252a04 38#include <urcu/tls-compat.h>
7685d963 39
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40#ifdef __linux__
41#include <syscall.h>
42#endif
43
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44/* hardcoded number of CPUs */
45#define NR_CPUS 16384
46
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47#if defined(_syscall0)
48_syscall0(pid_t, gettid)
49#elif defined(__NR_gettid)
50static inline pid_t gettid(void)
51{
52 return syscall(__NR_gettid);
53}
54#else
55#warning "use pid as tid"
56static inline pid_t gettid(void)
57{
58 return getpid();
59}
60#endif
61
62#ifndef DYNAMIC_LINK_TEST
63#define _LGPL_SOURCE
64#else
65#define debug_yield_read()
66#endif
ec4e58a3 67#include <urcu.h>
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68
69struct test_array {
70 int a;
71};
72
73pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
74
78efb485 75static volatile int test_go, test_stop;
10c48e14 76
9e31d0f0 77static unsigned long wdelay;
10c48e14 78
2b4e4125 79static volatile struct test_array test_array = { 8 };
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80
81static unsigned long duration;
10c48e14 82
daddf5b0 83/* read-side C.S. duration, in loops */
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84static unsigned long rduration;
85
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86/* write-side C.S. duration, in loops */
87static unsigned long wduration;
88
ab0aacbe 89static inline void loop_sleep(unsigned long loops)
daddf5b0 90{
ab0aacbe 91 while (loops-- != 0)
06f22bdb 92 caa_cpu_relax();
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93}
94
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95static int verbose_mode;
96
97#define printf_verbose(fmt, args...) \
98 do { \
99 if (verbose_mode) \
100 printf(fmt, args); \
101 } while (0)
102
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103static unsigned int cpu_affinities[NR_CPUS];
104static unsigned int next_aff = 0;
105static int use_affinity = 0;
106
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107pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
108
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109#ifndef HAVE_CPU_SET_T
110typedef unsigned long cpu_set_t;
111# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
112# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
113#endif
114
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115static void set_affinity(void)
116{
95bc7fb9 117#if HAVE_SCHED_SETAFFINITY
2a7ac59d 118 cpu_set_t mask;
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119 int cpu, ret;
120#endif /* HAVE_SCHED_SETAFFINITY */
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121
122 if (!use_affinity)
123 return;
124
d8540fc5 125#if HAVE_SCHED_SETAFFINITY
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126 ret = pthread_mutex_lock(&affinity_mutex);
127 if (ret) {
128 perror("Error in pthread mutex lock");
129 exit(-1);
130 }
2a7ac59d 131 cpu = cpu_affinities[next_aff++];
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132 ret = pthread_mutex_unlock(&affinity_mutex);
133 if (ret) {
134 perror("Error in pthread mutex unlock");
135 exit(-1);
136 }
d8540fc5 137
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138 CPU_ZERO(&mask);
139 CPU_SET(cpu, &mask);
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140#if SCHED_SETAFFINITY_ARGS == 2
141 sched_setaffinity(0, &mask);
142#else
2a7ac59d 143 sched_setaffinity(0, sizeof(mask), &mask);
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144#endif
145#endif /* HAVE_SCHED_SETAFFINITY */
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146}
147
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148/*
149 * returns 0 if test should end.
150 */
151static int test_duration_write(void)
152{
78efb485 153 return !test_stop;
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154}
155
156static int test_duration_read(void)
157{
78efb485 158 return !test_stop;
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159}
160
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161static DEFINE_URCU_TLS(unsigned long long, nr_writes);
162static DEFINE_URCU_TLS(unsigned long long, nr_reads);
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163
164static unsigned int nr_readers;
165static unsigned int nr_writers;
166
167pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
168
169void rcu_copy_mutex_lock(void)
170{
171 int ret;
172 ret = pthread_mutex_lock(&rcu_copy_mutex);
173 if (ret) {
174 perror("Error in pthread mutex lock");
175 exit(-1);
176 }
177}
178
179void rcu_copy_mutex_unlock(void)
180{
181 int ret;
182
183 ret = pthread_mutex_unlock(&rcu_copy_mutex);
184 if (ret) {
185 perror("Error in pthread mutex unlock");
186 exit(-1);
187 }
188}
189
190void *thr_reader(void *_count)
191{
192 unsigned long long *count = _count;
193
4bad7d45 194 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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195 "reader", (unsigned long) pthread_self(),
196 (unsigned long) gettid());
10c48e14 197
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198 set_affinity();
199
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200 while (!test_go)
201 {
202 }
203
204 for (;;) {
205 pthread_rwlock_rdlock(&lock);
206 assert(test_array.a == 8);
a0b7f7ea 207 if (caa_unlikely(rduration))
daddf5b0 208 loop_sleep(rduration);
10c48e14 209 pthread_rwlock_unlock(&lock);
bd252a04 210 URCU_TLS(nr_reads)++;
a0b7f7ea 211 if (caa_unlikely(!test_duration_read()))
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212 break;
213 }
214
bd252a04 215 *count = URCU_TLS(nr_reads);
4bad7d45 216 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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217 "reader", (unsigned long) pthread_self(),
218 (unsigned long) gettid());
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219 return ((void*)1);
220
221}
222
223void *thr_writer(void *_count)
224{
225 unsigned long long *count = _count;
226
4bad7d45 227 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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228 "writer", (unsigned long) pthread_self(),
229 (unsigned long) gettid());
10c48e14 230
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231 set_affinity();
232
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233 while (!test_go)
234 {
235 }
5481ddb3 236 cmm_smp_mb();
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237
238 for (;;) {
239 pthread_rwlock_wrlock(&lock);
2b4e4125 240 test_array.a = 0;
10c48e14 241 test_array.a = 8;
a0b7f7ea 242 if (caa_unlikely(wduration))
31b598e0 243 loop_sleep(wduration);
10c48e14 244 pthread_rwlock_unlock(&lock);
bd252a04 245 URCU_TLS(nr_writes)++;
a0b7f7ea 246 if (caa_unlikely(!test_duration_write()))
10c48e14 247 break;
a0b7f7ea 248 if (caa_unlikely(wdelay))
9e31d0f0 249 loop_sleep(wdelay);
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250 }
251
4bad7d45 252 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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253 "writer", (unsigned long) pthread_self(),
254 (unsigned long) gettid());
bd252a04 255 *count = URCU_TLS(nr_writes);
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256 return ((void*)2);
257}
258
259void show_usage(int argc, char **argv)
260{
261 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
262#ifdef DEBUG_YIELD
263 printf(" [-r] [-w] (yield reader and/or writer)");
264#endif
7685d963 265 printf(" [-d delay] (writer period (us))");
daddf5b0 266 printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0 267 printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45 268 printf(" [-v] (verbose output)");
9e97e478 269 printf(" [-a cpu#] [-a cpu#]... (affinity)");
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270 printf("\n");
271}
272
273int main(int argc, char **argv)
274{
275 int err;
276 pthread_t *tid_reader, *tid_writer;
277 void *tret;
278 unsigned long long *count_reader, *count_writer;
279 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 280 int i, a;
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281
282 if (argc < 4) {
283 show_usage(argc, argv);
284 return -1;
285 }
5481ddb3 286 cmm_smp_mb();
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287
288 err = sscanf(argv[1], "%u", &nr_readers);
289 if (err != 1) {
290 show_usage(argc, argv);
291 return -1;
292 }
293
294 err = sscanf(argv[2], "%u", &nr_writers);
295 if (err != 1) {
296 show_usage(argc, argv);
297 return -1;
298 }
299
300 err = sscanf(argv[3], "%lu", &duration);
301 if (err != 1) {
302 show_usage(argc, argv);
303 return -1;
304 }
305
306 for (i = 4; i < argc; i++) {
307 if (argv[i][0] != '-')
308 continue;
309 switch (argv[i][1]) {
310#ifdef DEBUG_YIELD
311 case 'r':
312 yield_active |= YIELD_READ;
313 break;
314 case 'w':
315 yield_active |= YIELD_WRITE;
316 break;
317#endif
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318 case 'a':
319 if (argc < i + 2) {
320 show_usage(argc, argv);
321 return -1;
322 }
323 a = atoi(argv[++i]);
2a7ac59d 324 cpu_affinities[next_aff++] = a;
9e97e478 325 use_affinity = 1;
4bad7d45 326 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 327 break;
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328 case 'c':
329 if (argc < i + 2) {
330 show_usage(argc, argv);
331 return -1;
332 }
9e31d0f0 333 rduration = atol(argv[++i]);
8b632bab 334 break;
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335 case 'd':
336 if (argc < i + 2) {
337 show_usage(argc, argv);
338 return -1;
339 }
9e31d0f0 340 wdelay = atol(argv[++i]);
10c48e14 341 break;
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342 case 'e':
343 if (argc < i + 2) {
344 show_usage(argc, argv);
345 return -1;
346 }
347 wduration = atol(argv[++i]);
348 break;
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349 case 'v':
350 verbose_mode = 1;
351 break;
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352 }
353 }
354
4bad7d45 355 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 356 duration, nr_readers, nr_writers);
9e31d0f0 357 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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358 printf_verbose("Reader duration : %lu loops.\n", rduration);
359 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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360 "main", (unsigned long) pthread_self(),
361 (unsigned long) gettid());
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362
363 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
364 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
365 count_reader = malloc(sizeof(*count_reader) * nr_readers);
366 count_writer = malloc(sizeof(*count_writer) * nr_writers);
367
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368 next_aff = 0;
369
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370 for (i = 0; i < nr_readers; i++) {
371 err = pthread_create(&tid_reader[i], NULL, thr_reader,
372 &count_reader[i]);
373 if (err != 0)
374 exit(1);
375 }
376 for (i = 0; i < nr_writers; i++) {
377 err = pthread_create(&tid_writer[i], NULL, thr_writer,
378 &count_writer[i]);
379 if (err != 0)
380 exit(1);
381 }
382
5481ddb3 383 cmm_smp_mb();
10c48e14 384
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385 test_go = 1;
386
387 sleep(duration);
388
389 test_stop = 1;
390
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391 for (i = 0; i < nr_readers; i++) {
392 err = pthread_join(tid_reader[i], &tret);
393 if (err != 0)
394 exit(1);
395 tot_reads += count_reader[i];
396 }
397 for (i = 0; i < nr_writers; i++) {
398 err = pthread_join(tid_writer[i], &tret);
399 if (err != 0)
400 exit(1);
401 tot_writes += count_writer[i];
402 }
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403
404 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 405 tot_writes);
a50a7b43 406 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 407 "nr_writers %3u "
9e31d0f0 408 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 409 argv[0], duration, nr_readers, rduration, wduration,
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410 nr_writers, wdelay, tot_reads, tot_writes,
411 tot_reads + tot_writes);
412
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413 free(tid_reader);
414 free(tid_writer);
415 free(count_reader);
416 free(count_writer);
417 return 0;
418}
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